Calculating-machine.



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W. P. QUENTELL. CALCULATING MACHINE.

APPLIUATIOH FILED SEPT. 23, 1909.

Patented Aug. 2, 1910.

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mt NDRRIS PETERS W. P. QUENTELL. CALCULATING MACHINE.

APPLICATION FILED SEPT. 8, 1909. 966,41 0, Patented Aug. 2, 1910.

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W. P. QUENTBLL. CALCULATING MACHINE.

APPLIOATION FILED SEPT, s. 1909.

966,410. Patented Aug. 2, 1910.

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UNITED STATES PATENT OFFICE.

WILLIAM 1?. QUENTELL, OF STAMFORD, CONNECTICUT, ASSIGNOR '10 SAMUEL OWEN EDMONDS, OF NEW YORK, N. Y.

CALCULATINGQEACHINE.

To all whom it may concern:

Be it known that I, \VILLIAM P. QUEN- TELL, a citizen of the United States, residing at Stamford, in the county of Fairfield and State of Connecticut, have invented certain new and useful Improvements in Calculati.ng\lacl1i11es, of which the following is a specification.

My invention relates to calculating machines and its object is to generally improve the construction of machines of this class.

My invention is embodied in preferable form in the device hereinafter described and illustrated in the accompanying drawings.

In these drawings, Figure 1 is a side view in elevation partly in vertical section of a number wheel, a key and intermediate parts for operating the wheel; Fig. 2 is a detail. side view in elevation of one of the detent devices and its operating and latching means; Fig. 8 is a detail side view of the numeral wheel operating mechanism show ing one of the mechanisms in ten position; Fig. 4: is a detail side view of operating lever showing locking means therefor; Fig. 5, a detail edge view of parts of Fig. 4; Fig. 6, a top plan view of a part of the machine; Fig. 7 is a partial bottom plan view; Fig. 8 a detail elevation of a key and the bar on which it is mounted and Fig. 9, a detail perspective of the slide-bar which is actuated by the key; Fig. 10, a. detail elevation of one side of number wheel; Fig. 11 a detail elevation of slotted plate and connections for operating the bell crank detent latches and the ear detents; Fig. 12, a detail of the number wheel shaft; Fig. 13, a detail side elevation of the driving arm; Fig. let, a detail edge view of said part; Fig. 15, a detail edge view of bell crank detent; Fig. 16, a detail side view of said latter part Fig. 17, a detail perspective view of the pawl carrying arm, and Fig. 18 is a detail perspective view of the driving arm.

My present invention relates to such a construction of the detent mechanism for preventing overthrow and controlling the carrying operation from the units column to the tens column as will avoid interference between the detent and the controlling mechanism therefor and to means for preventing the operation of the operating lever during the re-setting of the number wheels. The

other mechanisms herein shown and described are set forth merely to illustrate the Specification of Letters Patent.

Application filed. September 8, 1909.

Patented Aug. 2, 1910.

Serial No. 516,715.

mode of application of the novel features of my invention and their association with such mechanisms. Such other mechanisms are set forth in my application Serial No. 489,669, filed Apr. 15, 1909.

teferring to the drawings, 1 is a frame of a calculating machine and 2 designates a key which is one of a row, several banks of such rows being employed as is customary in such machines. Such key mechanism and its actuated parts have no connection with my present improvements, however. The key is mounted to move vertically on a bar 3 and at the lower end of its stem the ley is adapted to contact with one face of a swiveling slide-bar t having angle faces and which is provided with slots 5 or other means of stopping the bar against the key stem when the bar is tilted by the key and slid toward the front of the machine. A de tent 6 normally engages the slide-bar and holds it toward the back of the machine. A link 7 has a lug 8 loosely engaging a slot in the slide-bar and to the front end of this link is connected a spring 9, which spring, when the slide-bar is tilted by the contact of the key, draws the end of the slide-bar slot against the stem of said key.

The setting means for positioning the actuating pawl for the number wheel rotating gear is connected to the rear end of the link 7, whereby when the link is drawn forward such actuating pawl is carried the proper distance to enable it when moved through the usual operating lever to rotate the gear wheel and thus turn the number wheel to the proper registration according with the amount indicated by the number on the depressed key. This setting mechanism will now be described. To the rear end of link 7 is pivotally connected a pawl-carrying arm 11 which is loosely mounted by means of a sleeve on a main shaft 12 extending across the machine and journaled in the side frames thereof. Pivoted on this arm is a pawl 18 adapted to engage a gear wheel 14: also loosely mounted on the shaft 12. The teeth of this gear wheel may either be of ordinary ratchet form or preferably may be ordinary curved, spur gear teeth, with slight bevels on the rear side at the end to permit the pawl to move toward the front of the machine over them without engaging therewith. A spring 15 serves to normally hold the pawl against the gear teeth, such spring being connected to a pin 16 extending from the pawl through an enlarged hole 1? in the pawl- *arrying arm. The gear wheel meshes with a pinion 18 carried by a sleeve 19 on which is also fixed the number wheel 20, which bears the numerals from O to 9, corresponding to and positioned relatively to the digits in the longitudinal row of keys in line with the wheel.

Each pawl carrier 11 is adapted to be picked up and oscillated by a driving arm 21, hung on the main shaft. A universal transverse connecting rod 22 extends loosely through circular apertures in the driving arms. Two or more of the arms are fixed to the main shaft so as to be turned there with and thus swing the connecting-rod, and the other arms are hung freely on the shaft. The rod is adapted to oscillate all the driver arms and the latter in turn oscillate the niwl-carriers, at each actuation of the main operating lever The actuation of the pawl carriers causes the pawls 13 to carry back the gears and number wheels a distan corresponding to the number of teeth of the gears over which the pawls have been carried by the key-actuated slide-bar. The rod is adapted to move over the forward part of the pawls 13. when the driver arms are carried against the pawl carriers in the registering movement and to approach closely enough to the pawls to prevent them from moving out of engagement with their gears; thus, the rod constitutes a pawl lock.

To swing the pawl carrier and thus rotate the number wheel, each driving arm is provided with means to contact with the pawl carrier. Each driving arm is pro vided with a rocker 21 pivoted thereon and held normally in engagement with a trigger 25 also pivoted on the driving arm. The rocker has a shoulder 26 against which bears a lug 27 of the trigger, and a spring 28 joins the trigger and an arm of the rocker and normally holds these parts in engagement. keeping the trigger down against the shoulder 26 and the shoulder behind the lug of the trigger. The trigger has a pointed or beveled end 29 which is adapted to be tripped by a part of a detent or stop member in order to permit the rocker to gi 'e an extra movement to effect the carrying operation as hereinafter described. To permit this extra movement. an elongated areshaped slot 30 is formed in the driving arm through which extends a tooth 31 of the rocker whereby the rocker is permitted a limited range of movement with respect to the driving arm. The rocker is adapted to contact with a lug 32 projecting from the iiawl-carrier 11, so as to carry the latter arm toward the rear of the machine and thus operate the gear and pinion. when the driving arm is oscillated by the rotation of the main shaft.

On a shaft 33 mounted in the frame-work are pivotally mounted detent or stop devices adapted to prevent overthrow of the pawl carrier and also for controllingthc operation of the carrying means. Each comprises a main member 31 and an auxiliary pawl-carrying member 35, the latter pivotally movable in one direction independently of the member 3%. The member 31 is in the form of a bell crank and at its upper end is engaged by a spiral spring 36 normally holding the lower end of the bell crank member projected forward toward the pawl arm. The lower end of the bell crank is formed into a stop projection 37 which projects into the path of a lug 38 on the arm of the pawl. carrier, whereby in registering any amounts below 10, the projection 37 will act as a. momentum stop for the pawl arm, preventing any overthrow of the pawl arm that would tend to turn the number wheel another tooth. The detent device is also provided with means to control the carrying of the addition from one decimal place to the next higher column. To this end, on the member is pivotally mounted a yielding trip pawl or rocker member 39 having one end beveled and the other end normally held up against the sleeve Q0 of the member 35 by means of a spring 11.

Cooperating with each pawl and adapted to tilt the bell crank member so as to carry the stop arm thereof out of the path of the pawl arm, is a lever 12, carried on the shaft 13, and downwardly pressed by a spring lit. The lever t2 has a projection -15 adapted to ride on a cam 1-6 carried by the number wheel. hen the wheel moves from 9 to O the spring M- will throw the lever -12 downward as the cam slips past the projection 45. The end of the lever strikes the pawl 35 and rocks the pawl and the pawl carrying member 35 backward, and a depending projection 46 on the member contacts with a right angled lug ti on the main detent member 34:, thus rocking the detent member backward and carrying its stop projection 37 out of the path of the lug 38 of the gear arm. As the detent member is moved back. it is engaged and held in rearward position by a spring-pressed, pivoted, hooked latch #18 which is mounted on a shaft 49 and has a tail piece 50. hen the detent has been moved back into carrying position by the wheel of the column from which the carrying is to be effected. the carrying movement is then effected by the release of the trigger 25 of the driving arm corresponding to the adjacent wheel of the next higher column to which column the amount is to be carried. This movement is effected by the oscillation of the driving arm 21 and by the beveled end of the trigger striking against the detent lug 47 which has been thrown into the path of the trigger by which contact the trigger is disengaged from the rocker and the latter is thus free to move independently of the driving arm. At each oscillation of the driving arm the tooth 31 of the rocker bears against a spring-pressed lever 51 mounted on the shaft 52, rocking said lever on its pivot against the force of its spring. As the rocker is tripped from engagement with its trigger, the lever 51 throws the rocker forward and it will thus strike against the pawl-carrier 11 and give said pawl carrier an extra impulse that will turn the gear wheel another tooth and turn the number wheel to the next higher number so as to carry over the addition to the column of that wheel. from the next lower column. The end of the pawl carrier 11 is provided with a lug or horn 53 in connection with which the sleeve of the member 3% serves as a momentum stop to prevent overthrow of the gear arm in effecting the carrying movement.

The above movements are effected by the downward pull on the operating lever. In effecting this carrying movement as the lever 4L2 slips down past the point of the pawl 89, in actuating said pawl, so as to shift the detent, the tension on the spring of the pawl carrier will be relieved and said spring will cause the carrier and pawl to be jerked forward so as to carry the pawl back to normal position above the lowered end of the lever 42 in which normal position the end of the pawl so extends that it can be struck or pressed against by the lever 42 only when the latter slips off the projection of the cam as, at the time when the number wheel passes from the 9 to 0 position. By this arrangement it is rendered impossible for the top of the pawl to strike against the lever 42 before the detent is released from. its latch and returned to normal position. Upon the return movement of the operating lever which is provided with a return spring 54 on the main shaft, the latches are released and the detents and driving arms returned to normal position. To effect the release of the latches, a bail 55 extends under the tail pieces 50 of all the latches, such bail having arms 56 pivoted on the shaft 49, one of which arms is pivotally connected to the end of a link 5'7, which has a pin 58 engaging a cam slot 59 formed in the disk or plate 60 carried by the main shaft, whereby at the finish of the return stroke of the operating lever, the bail 55 will be tilted upward and rock the latches so as to release the detents and permit tl e latter to be restored to normal position by their springs. A guide link 61 pivotally engages the forward end of the link 58 and is pivoted on a shaft (52. On the other end of the link 61 is fixed an arm (33 of a rocking combba1l 64 havmg projecting teeth 65 adapted to be engaged with and released from the gears upon the rocking of the bail through the main shaft and cam slot. This comb holds the gears from undue forward or registering movement, liable to be caused by the possible rebounding of the slide bar as it strikes the key stem in its retracting movement. The teeth are withdrawn from the gears immediately upon the initial movement of the operating handle for the purpose of permitting the proper registering operation of the gears and wheels.

Mounted on the upper part of the machine on a shaft (36 are spring-pressed detents 67 also adapted to engage the gears and to prevent backward rotation thereof, particularly when the driving pawls are ratcheting into place with the slide bar.

Means are provided to enable the amount indicated by a depressed key or keys to be repeated in registering and such means comprise a small lever 68 mounted on a rocking shaft (39 which is provided with projecting pieces 70. adapted to strike against the transverse arm 71 of a sliding frame having longitudinal bars .72, which extend adjacent to and are guided by the bars on which the key-stems are mounted. These bars 72 have struck-out ears '73 one for each key, extending through the slots 74lin the key-stem supporting bars, and adapted when the lever 68 is pulled forward, to be carried by the sliding bars 72 over the projections 75 of any keys, that may be depressed, thereby holding the key down and preventing the pawl arm actuating slide bars from engaging their detents so that the amounts indicated by the keys thus held down may be repeated by operating the main operating lever as many times as desired. Multiplication may be thus effected.

Extending upward through the frame at the rear of the machine are a series of error keys 7G pivoted to levers 77 mounted loosely on the main shaft and provided with arms '78. When a wrong key has been depressed and it is desired to correct the error before registering, the error key is depressed and therefore the arm 78 is lifted against the driving pawl 13, so as to remove the same from engagement with the gear and carry the pawl backward to original position, which action at the same time releases the key from the slide bar and permits the slide bar to return to normal position.

To enable the number wheels to be reset to O, the number wheel shaft is slidably mounted in the frame so that it may be slipped sidewise until spring pressed pawls 79 carried on the hubs 80 of the wheels and projecting into the interior of the hubs, drop into grooves 81 in the shaft so that the wheels are then locked to the shaft and are forced to rotate with it. The grooves 81 are made slanting at each end in order that the pawls may readily slip into and out of the same. The wheels normally bear on the plain peripheral portions between the grooves. The shaft is normally locked from rotation by the pin 82 at the right side of the machine which pin engages a hole 83 in a disk cone at the end of the shaft.

In connection with means for re-setting the number wheels to zero, I employ means to prevent the operating lever from being moved while the wheels are engaged with their shaft for the purpose of re-setting. The shaft carries at one end a knurled knob 88 and between the operating lever and the side of the machine the shaft has cone S9 with a flat ring portion 90 at its base, and a straight reduced portion 91 joining the cone and knob. The operating lever has a curved horn or hook 92 which is adapted to move freely past the straight portion 01 when the lever is operated, but which the cone 89 is adapted to engage when the number wheel shaft is pulled out. In operating this mechanism. when the munber wheels are to be reset to Zero. the shaft of the number wheels pulled out longitudinally until the pawls of the wheels engage the grooves in the shaft so that the wheels may be turned by rotating the shaft from the knurled knob. The outward movement of the shaft carries the cone St) against the lever so as to move itslightly forward, and upon the further outward movement of the shaft, the flat ring portion of the cone bears on the lever and on the inner side of the horn 92 and this prevents the movement of the lever in either direction. The slight forward movement imparted to the operating lever by the contact of the cone serves to move the slotted cam plate 60 so as to tilt the comb (it and thus release the teeth (37 thereof from their respective gears, whereby upon the rotation of the number wheel shaft to re-set the number wheels the pinions and gears may move freely, andany danger of injury to the mechanism by the positive engagement of the pinions and shaft and the rotation of the latter while so engaged is prevented. After the wheels have been re-set, the shaft is pushed in and the lever is thereby freed and is ready to be operated.

The general operation of the machine is as follows: A key or several keys being depressed. the slide-bar or bars -,t corresponding thereto will be released and impelled toward the front of the machine by the spring 9 and link 7 until the bars are stopped by the contact of their graduated stops against their keys. The pawl carrier and pawl of each slide bar that is actuated will be pulled back a distance corresponding to the movement of the bar. thus setting these parts in position to rotate the gear wheel and pinion so as to turn the number wheel to the proper number. The operating lever is then pulled down. As the lever comes down, the bail actuated by the plate moves from the tail pieces of the latches and said latches by their springs are thrown into position to engage the detents when the latter are moved back. At the same time the plate releases the teeth of the comb bail (ll from engagement with the large gears ll. The further movement of the lever causes the rod to pick up and :arry forward the driving arms 21, the rocker 2st of each driving arm striking against the edge of its respective pawl car rier ll and by the pawl 13 rotating the gear wheel and pinion, the projection 37 of the detent serving as a stop for the pawl carrier to prevent the momentum of the pawl from carrying the number wheel beyond the proper indication. Should any of the number wheels carry over the addition from 9 to t), the wheel of the column from which the carrying is to be done, will by its cam 46 trip the lever l2 which will actuate the detent of the next higher column, tilting said detent until it engages its latch. Thereupon the trigger 25 of the driving arm of the said adjacent higher wheel will be tripped by contact with the lug +t-T of the detent, permitting the rocker to be thrown forward an eX tra movement, such movement imparting an extra movement to the pawl carrier and pawl thus impelling the gear another tooth so as to give an extra movement to the corresponding wheel and thus carry over the addition. The forward registering movement of the pawl carriers returns the slide-bars a into engagement with their holding detents. ()n the return movement of the operating lever, the parts are restored to normal posi tion. As the number wheels are again actuated. the carrying-mechanism levers 42 will be raised by the cams on the number wheels, the pawls 39 on the detents yielding to permit the levers to pass freely. At the finish of the return stroke, the bail moves the latches away from the detents permitting the latter to return to normal position.

It is clear that various changes in the parts of the mechanisms may be made without departing from the principle of my invention.

Having thus described my invention, what I claim is:

1. In a calculating machine, in combination with a series of number wheels, driving means for the number wheels, movable detents for controlling the movement of the wheel driving means, means for actuating the detents in order to permit the wheel driving means to make an extra movement to carry the decimal from the lower to the higher wheel, means carried by the wheels for controlling the said actuating means, said detents each comprising two members independently movable in one direction, means for restoring one of said members to normal position automatically while the other member remains set in the ten position, substantially as described. I

In a calculating machine, in combination with a series of number wheels, driving means for the number wheels, cams carried by the number wheels, levers actuated by the cams, movable detents for determining the movement of the wheel driving means, said detents actuated by the cam actuatedlever in order to permitthe wheel driving means to make an extra movement to carry the decimal from the lower to the higher wheel, said detents each comprising two members, one of which is movable with the other to the ten position and independently movable back to normal position, and a spring for effecting such independent return movement, substantially as described.

In a calculating machine, in combination. with a series of number wheels, driving means for said wheels, movable detent stop members for determining the extent of movement of the wheel driving means, means for moving the detent stop members to permit the wheel driving means to make an extra movement to carry the decimal from the lower to the higher wheel, means carried by the number wheel for actuating said stop member, moving means and yielding contact means between the detent stop members and the stop member moving means, said detent stop members each having a main pivoted member, an auxiliary member pivotally movable with respect to the first member, an arm on the first inembe against which the auxiliary member strikes to move the main member to the te position, said auxiliary member having means to automatically restore it to normal position independently of the main member, and means to contact with the lever being carried by said auxiliary member, substantially as described.

t. In a calculating machine, a pivoted detent member, an auxiliary pivoted member having means to contact with and move the first member in one direction, a spring to restore the auxiliary member to normal po sition independently of the first member, a pawl yieldable in one direction and pivoted on said auxiliary member, means for actuating said pawl, a number wheel, means on said number wheel for controlling said actuating means, and wheel driving means controlled in movement by said detent 1nembers, substantially as described.

5. In a calculating machine in combination with a series of number wheels, shaft on which said wheels are mounted, said shaft being slidable longitudinally, said wheels normally freely rotatable on said shaft, means to lock said wheels and shaft together, an operating lover, a cone on said shaft adapted to bear against said lever when the shaft is moved longitudinally, and means of engagement between the shaft and lever, whereby when the shaft is pulled out, the lever will be locked against movement, substantially as described.

6. In a calculating machine, in combination with a series of number wheels, a sliding shaft on which said wheels are rotatably mounted, a main shaft, an operating lever on the main shaft, means on the sliding wheel shaft adapted to positively engage the operating lever and prevent its movement in either direction, substantially as described.

7. In a calculating machine, in combina tion with an operating lever, a number wheel shaft, said shaft being slidable longitudinally, a curved arm on said. lever, a cone on said shaft, a fiat portion at the base of the cone adapted to engage said arm, substantially as described.

8. In a calculating machine, in combination with a main shaft, an operating lever on said shaft, a sliding number wheel shaft ha ing a cone on the outer end, said cone having a flat peripheral portion at its base, a knob at the extremity of said sliding shaft, a straight reduced portion between the knob and cone, a curved projecting arm. extending from the lever, said cone adapted to pass between the body of the lever and said arm to hold the lever locked against movement in either direction, substantially as described.

9. In a calculating machine, in combination with a main shaft, an operating lever therefor, a series of number wheels, pawls carried by the number wheels, a number wheel shaft, said shaft h aving grooves adapted to engage the number wheel pawls when the shaft is moved endwise, a cone on the end of the shaft, a fiat peripl'ieral portion at the base of the cone, said cone adapted to bear against the lever and move the same when pulled outwardly and means on the lever adapted to engage the fiat part of the cone to prevent movement of the lever in either direction, substantially as described.

10. In a calculating machine, in combination with a series of number wheels, at slidable shaft for said wheels, gears for turning said wheels, detaining means for said gears, a main shaft, a connection between the main shaft and detainin means for moving the said means into or out of operative position, an operating lever carried by the main shaft and means for automatically moving said lever to release the detaining means when the number wheel shaft is moved longitudinally, substantially as described.

11. In a calculating machine, in combination with a series of number wheels, at slidable shaft on which said wheels are m ounted, gears for turning the number wheels, detaining means for the gears, a main operating shaft, a handle therefor, a CODHQCIi! between the main shaft and detaining means for moving said means into or out of operative position, a cone carried by the number wheel shaft and a projecting member carried by the handle with which said cone is adapted to contact to move said handle and main shaft, substantially as described.

12. In a calculating machine, in combination with a main shaft, an operating lever carried thereby, a sliding shaft, number wheels mounted on said sliding shaft, gears for driving said wheels, detaining means for said gears, a connection between the main shaft and said detaining means whereby the latter is moved into and out of operative position, a cone carried by said sliding shaft, said cone having a flat peripheral base portion, a projecting hool: member carried by the operating lever, and adapted to engage the flat base, whereby upon the sliding wheels, a tilting bail having a comb for engaging said gears, means for tilting said bail, a main shaft, means connecting the main shaft and bail tilting means, an operating lever on said main shaft, and means carried by the sliding shaft for moving said lever a determinate distance sufficient to release said comb and means carried by the sliding shaft for locking said lever against further movement, substantially as described.

le. In a calculating machine, in combination with a series of number wheels, gears for driving the same, pawls for operating the gears, oscillatory means for carrying the pawl driving members, a main shaft, a driving and connecting rod engaging said driving members, and connected by the main shaft, said rod extending adjacent to the pawls and forming a lock therefor, substantially as described.

In testimony whereof I have aflixed my signature, in presence of two witnesses.

\VILLIAM P. QUEN TELL. lYitnesses CHESTER P. MEEKER, CHESTER S. SEELECK. 

